NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-12-08 | 615-914 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | FRANKLIN | TN |
| 2021-12-15 | 615-437 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | CARTHAGE | TN |
| 2021-11-15 | 615-703 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | KINGSTNSPG | TN |
| 2021-10-29 | 615-623 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | GALLATIN | TN |
| 2021-10-29 | 615-639 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | DICKSON | TN |
| 2021-10-29 | 615-652 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | PORTLAND | TN |
| 2019-04-18 | 615-637 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | SCUNNINGHA | TN |
| 2018-05-04 | 615-488 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | ADMSCDARHL | TN |
| 2017-05-03 | 615-619 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | PLEASANTVW | TN |
| 2015-06-03 | 615-808 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | HARTSVILLE | TN |
| 2015-05-11 | 615-640 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | EAGLEVILLE | TN |
| 2014-06-18 | 615-987 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | MURFREESBO | TN |
| 2014-06-16 | 615-813 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | CRSPLORLND | TN |
| 2013-04-19 | 615-956 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | MURFREESBO | TN |
| 2013-01-11 | 615-802 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | PORTLAND | TN |
| 2012-07-25 | 615-450 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | HARTSVILLE | TN |
| 2012-04-04 | 615-864 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
| 2011-08-24 | 615-436 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | SPENCERMIL | TN |
| 2010-09-20 | 615-601 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
| 2010-06-09 | 615-200 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
| 2010-02-15 | 615-576 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | VANLEER | TN |
| 2010-02-15 | 615-669 | 0–9 XXXwhole prefix which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
| 2008-06-20 | 615-873 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
| — | 615-592 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | TRIUNE | TN |
| — | 615-671 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | CHARLOTTE | TN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.